Project Red would probably be better by now, in as much as Forge Multipart is present in a lot more places than Immibis Microblocks.
RedLogic + Microblocks are by now a simple 2-year old solution to a 2-year old problem, for which there are now other, more expansive solutions.
... I'm not sure how either of them handle Red Alloy ingots though; if they handle them the wrong way, it could become way too easy to make GT circuits.